| Abstract [eng] |
POSSIBILITIES OF EVALUATION OF PERENNIAL HERBACEOUS PLANT POPULATIONS APPLYING HERBOCHRONOLOGICAL METHODS SUMMARY Arrangement of annual growth rings in the roots of Lupinus polyphyllus, Malva alcea, Rumex acetosa, R. confertus, R. obtusifolius, Arctium tomentosum, Cichorium intybus, Heracleum sosnowskyi, Armoracia rusticanais were analysed. Three different populations of Lupinus polyphyllus were analysed thoroughly and evaluation of correlation between the age of the plant and other morphometric parameters (the number of vegetative sprouts, the length and number of generative sprouts, the length of the raceme and the number of pods and ripened seeds) is presented. L. polyphyllus has been chosen for thorough herbochronological analysis because of its invasiveness into natural and disturbed habitats, large aboveground biomass and great ability to survive. Using herbochronological methods three different populations of L. polyphyllus have been analysed and weak correlation between the age of the plants and investigated aboveground parts has been discovered. Both the plants growing in different populations and the individuals of the same age growing in the same population are very different by the number of formed vegetative and generative sprouts and ripened seeds. This research has shown that determination of the age of a plant by morphological indications only is complicated. It should be taken into account that the growth conditions could influence the growth and formation of aboveground parts of the same size. Therefore it is expedient to evaluate the age structure of the population of some herbaceous plants by annual rings formed in the roots. |
